How Academic Dentistry will Emerge from this Economic Crisis?

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The crisis in academic radiology: will we help ourselves?

The overall health of academic radiology suffers from insufficient funds and manpower. Although the largest academic programs in the country may have sufficient resources to maintain robust academic environments, one third to half of the academic radiology programs in the United States are struggling to maintain stable academic environments. The impact of an impaired academic radiology enterpri...

Will a Black Hole Soon Emerge from SN 1997 D ?

Observations combined with theoretical modeling of the light curve of the recently discovered supernova 1997D in NGC 1536 suggest that it might host a black hole formed in the aftermath of the explosion. We consider some observable consequences of a black hole in SN 1997D and estimate the late–time accretion luminosity of the material which falls back onto the hole. We find that this luminosity...

How do communication systems emerge?

Communication involves a pair of behaviours--a signal and a response--that are functionally interdependent. Consequently, the emergence of communication involves a chicken-and-egg problem: if signals and responses are dependent on one another, then how does such a relationship emerge in the first place? The empirical literature suggests two solutions to this problem: ritualization and sensory m...

How Classical Particles Emerge From the Quantum World

The symmetrization postulates of quantum mechanics (symmetry for bosons, antisymmetry for fermions) are usually taken to entail that quantum particles of the same kind (e.g., electrons) are all in exactly the same state and therefore indistinguishable in the strongest possible sense. These symmetrization postulates possess a general validity that survives the classical limit, and the conclusion...